On Jul 31, 2007 09:44 +0200, Jan Blunck wrote: > Ok, this is pretty similar to the way I implemented this for tmpfs. The > problem is that the union mount code is explicitly checking if the filesystem > is supporting whiteout. I used to use a new filesystem flag (FS_WHITEOUT) for > this but thought that disk filesystem like ext2/3/4 will have problem with > that if you mount an old image. So I guess I still need a feature flag.
You also need whiteout support for extents. This could be done with unwritten extents potentially, or as I previously proposed (RFC) in linux-ext4. Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
